00008284752012-12-312012-12-310000828475ck0000828475:S000000091Member2012-12-312012-12-310000828475ck0000828475:S000000091Memberck0000828475:C000000134Member2012-12-312012-12-310000828475ck0000828475:S000000091Memberck0000828475:C000000136Member2012-12-312012-12-310000828475ck0000828475:S000000091Memberck0000828475:C000041105Member2012-12-312012-12-310000828475ck0000828475:S000000091Memberck0000828475:C000073401Member2012-12-312012-12-310000828475ck0000828475:S000000091Memberrr:AfterTaxesOnDistributionsMemberck0000828475:C000000134Member2012-12-312012-12-310000828475ck0000828475:S000000091Memberrr:AfterTaxesOnDistributionsAndSalesMemberck0000828475:C000000134Member2012-12-312012-12-310000828475ck0000828475:S000000091Memberck0000828475:index_Barclays_Municipal_Bond_Index_reflects_no_deduction_for_fees_expenses_or_taxesMember2012-12-312012-12-31xbrli:pureiso4217:USDClass A shares bought without an initial sales charge as part of an investment of $1 million or more may be charged a deferred sales charge of 1.00% if redeemed within one year.The Dreyfus Corporation has contractually agreed, until at least at least May 1, 2014, to limit the fund's expenses, exclusive of taxes, brokerage commissions, extraordinary expenses, interest expenses, commitment fees on borrowings, shareholder servicing fees and Rule 12b-1 fees, but including the management fee, to .60 of 1% of the value of the fund's average daily net assets. This agreement may be terminated on or after May 1, 2014.For the fund's Class C shares, periods prior to 1/7/03 and for Class I shares, periods prior to 12/15/08 reflect the performance of the fund's Class A shares adjusted to reflect each share classes' applicable sales charge. Such performance figures have not been adjusted, however, to reflect applicable class fees and expenses; if such fees and expenses had been reflected, the performance shown for Class C shares for such period may have been lower.DREYFUS NEW JERSEY MUNICIPAL BOND FUND INC485BPOSfalse00008284752012-12-312013-04-262013-05-012013-05-01Fund SummaryDRNJXDCNJXDZNJXDNMIXPrincipal Risks<p style="TEXT-ALIGN: left"> <font style="font-weight: normal; font-size: 10pt; font-style: normal; font-family: ;" color="#000000">An investment in the fund is not a bank deposit. It is not insured or guaranteed by the Federal Deposit Insurance Corporation (FDIC) or any other government agency. It is not a complete investment program. The fund's share price fluctuates, sometimes dramatically, which means you could lose money.</font> </p> <br/><p style="MARGIN-LEFT: 8.65pt; TEXT-INDENT: -8.65pt; TEXT-ALIGN: left"> <font><font style="font-weight: normal; font-size: 10pt; font-style: normal; font-family: symbol;" color="#000000">&#183;</font></font><font><font style="WORD-SPACING: 10pt"><font style="font-weight: normal; font-size: 10pt; font-style: normal; font-family: symbol;" color="#000000">&#160;</font></font></font><font><i><font style="font-weight: normal; font-size: 10pt; font-family: ;" color="#000000">Municipal securities risk.</font></i></font> <font style="font-weight: normal; font-size: 10pt; font-style: normal; font-family: ;" color="#000000">The amount of public information available about municipal securities is generally less than that for corporate equities or bonds. Special factors, such as legislative changes, and state and local economic and business developments, may adversely affect the yield and/or value of the fund's investments in municipal securities. Other factors include the general conditions of the municipal securities market, the size of the particular offering, the maturity of the obligation and the rating of the issue. Changes in economic, business or political conditions relating to a particular municipal project, municipality, or state in which the fund invests may have an impact on the fund's share price.</font> </p> <br/><p style="MARGIN-LEFT: 8.65pt; TEXT-INDENT: -8.65pt; TEXT-ALIGN: left"> <font><font style="font-weight: normal; font-size: 10pt; font-style: normal; font-family: symbol;" color="#000000">&#183;</font></font><font><font style="WORD-SPACING: 10pt"><font style="font-weight: normal; font-size: 10pt; font-style: normal; font-family: symbol;" color="#000000">&#160;</font></font></font><font><i><font style="font-weight: normal; font-size: 10pt; font-family: ;" color="#000000">Interest rate risk.</font></i></font> <font style="font-weight: normal; font-size: 10pt; font-style: normal; font-family: ;" color="#000000">Prices of municipal bonds tend to move inversely with changes in interest rates. Typically, a rise in rates will adversely affect bond prices and, accordingly, the fund's share price. The longer the effective maturity and duration of the fund's portfolio, the more the fund's share price is likely to react to interest rates.</font> </p> <br/><p style="MARGIN-LEFT: 8.65pt; TEXT-INDENT: -8.65pt; TEXT-ALIGN: left"> <font><font style="font-weight: normal; font-size: 10pt; font-style: normal; font-family: symbol;" color="#000000">&#183;</font></font><font><font style="WORD-SPACING: 10pt"><font style="font-weight: normal; font-size: 10pt; font-style: normal; font-family: symbol;" color="#000000">&#160;</font></font></font><font><i><font style="font-weight: normal; font-size: 10pt; font-family: ;" color="#000000">Credit risk.</font></i></font> <font style="font-weight: normal; font-size: 10pt; font-style: normal; font-family: ;" color="#000000">Failure of an issuer to make timely interest or principal payments, or a decline or perception of a decline in the credit quality of a municipal bond, can cause the bond's price to fall, potentially lowering the fund's share price. The lower a bond's credit rating, the greater the chance &#8211; in the rating agency's opinion &#8211; that the bond issuer will default or fail to meet its payment obligations. To the extent the fund invests in high yield ("junk") bonds, its portfolio is subject to heightened credit risk.</font> </p> <br/><p style="margin-left: 8.65pt; text-indent: -8.65pt; text-align: left;"> <font><font style="font-weight: normal; font-size: 10pt; font-style: normal; font-family: symbol; color: #000000;">&#183;</font></font><font><font style="word-spacing: 10pt;"><font style="font-weight: normal; font-size: 10pt; font-style: normal; font-family: symbol; color: #000000;">&#160;</font></font></font><font><em><font style="font-weight: normal; font-size: 10pt; color: #000000;">Liquidity risk.</font></em></font> <font style="font-weight: normal; font-size: 10pt; font-style: normal; color: #000000;">When there is little or no active trading market for specific types of securities, it can become more difficult to sell the securities at or near their perceived value. In such a market, the value of such securities and the fund's share price may fall dramatically, even during periods of declining interest rates. The secondary market for <font style="font-size: 10pt; font-style: normal; font-weight: normal; color: #000000;">certain municipal bonds tends to be less well developed or liquid than many other securities markets, which may adversely affect the fund's ability to sell such municipal bonds at attractive prices.</font></font> </p> <br/><p style="margin-left:08.65pt;text-align:left;text-indent:-08.65pt;"> <font><font color="#000000" style="font-size:10.0pt;font-style:normal;font-weight:normal; font-family: symbol;">&#183;</font></font><font><font style="word-spacing:10.0pt;"><font color="#000000" style="font-size:10.0pt;font-style:normal;font-weight:normal; font-family: symbol;">&#160;</font></font></font><font><i><font color="#000000" style="font-size:10.0pt;font-weight:normal; font-family: ;">State-specific risk.</font></i></font> <font color="#000000" style="font-size:10.0pt;font-style:normal;font-weight:normal; font-family: ;">The fund is subject to the risk that New Jersey's economy, and the revenues underlying its municipal bonds, may decline. Investing primarily in a single state makes the fund more sensitive to risks specific to the state and may magnify other risks.</font> </p> <br/><p style="margin-left:08.65pt;text-align:left;text-indent:-08.65pt;"> <font><font color="#000000" style="font-size:10.0pt;font-style:normal;font-weight:normal; font-family: symbol;">&#183;</font></font><font><font style="word-spacing:10.0pt;"><font color="#000000" style="font-size:10.0pt;font-style:normal;font-weight:normal; font-family: symbol;">&#160;</font></font></font><font><i><font color="#000000" style="font-size:10.0pt;font-weight:normal; font-family: ;">Inverse floating rate securities risk</font></i></font><font color="#000000" style="font-size:10.0pt;font-style:normal;font-weight:normal; font-family: ;">. The interest payment received on inverse floating rate securities generally will decrease when short-term interest rates increase. Inverse floaters are derivatives that involve leverage and could magnify the fund's gains or losses.</font> </p> <br/><p style="margin-left:08.65pt;text-align:left;text-indent:-08.65pt;"> <font><font color="#000000" style="font-size:10.0pt;font-style:normal;font-weight:normal; font-family: symbol;">&#183;</font></font><font><font style="word-spacing:10.0pt;"><font color="#000000" style="font-size:10.0pt;font-style:normal;font-weight:normal; font-family: symbol;">&#160;</font></font></font><font><i><font color="#000000" style="font-size:10.0pt;font-weight:normal; font-family: ;">Non-diversification risk.</font></i></font> <font color="#000000" style="font-size:10.0pt;font-style:normal;font-weight:normal; font-family: ;">The fund is non-diversified, meaning that a relatively high percentage of the fund's assets may be invested in a limited number of issuers. Therefore, the fund's performance may be more vulnerable to changes in the market value of a single issuer or group of issuers and more susceptible to risks associated with a single economic, political or regulatory occurrence than a diversified fund.</font> </p>The fund's share price fluctuates, sometimes dramatically, which means you could lose money.The fund is non-diversified, meaning that a relatively high percentage of the fund's assets may be invested in a limited number of issuers. Therefore, the fund's performance may be more vulnerable to changes in the market value of a single issuer or group of issuers and more susceptible to risks associated with a single economic, political or regulatory occurrence than a diversified fund.An investment in the fund is not a bank deposit. It is not insured or guaranteed by the Federal Deposit Insurance Corporation (FDIC) or any other government agency. Portfolio Turnover<p style="TEXT-ALIGN: left"> <font style="font-weight: normal; font-size: 10pt; font-style: normal; font-family: ;" color="#000000">The fund pays transaction costs, such as commissions, when it buys and sells securities (or "turns over" its portfolio). A higher portfolio turnover may indicate higher transaction costs and may result in higher taxes when fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the fund's performance. During the most recent fiscal year, the fund's portfolio turnover rate was 12.10% of the average value of its portfolio.</font> </p>0.1210Fees and Expenses<p style="TEXT-ALIGN: left"> <font style="font-weight: normal; font-size: 10pt; font-style: normal; font-family: ;" color="#000000">This table describes the fees and expenses that you may pay if you buy and hold shares of the fund. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in certain funds in the Dreyfus Family of Funds. More information about these and other discounts is available from your financial professional and in the Shareholder Guide section beginning on page 9 of the prospectus and in the How to Buy Shares section and the Additional Information About How to Buy Shares section beginning on page II-1 and page III-1, respectively, of the fund's Statement of Additional Information.</font> </p>0.04500.00000.00000.00000.00000.01000.00000.00000.00600.00600.00600.00600.00000.00750.00000.00000.00360.00390.00140.00180.00960.01740.00740.0078-0.0011-0.0014-0.0014-0.00120.00850.01600.00600.0066~ http://dreyfus.com/20130426/role/ScheduleShareholderFees20001 column dei_LegalEntityAxis compact ck0000828475_S000000091Member row primary compact * ~~ http://dreyfus.com/20130426/role/ScheduleAnnualFundOperatingExpenses20002 column dei_LegalEntityAxis compact ck0000828475_S000000091Member row primary compact * ~2014-05-01You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in certain funds in the Dreyfus Family of Funds.Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) 50000Class A shares bought without an initial sales charge as part of an investment of $1 million or more may be charged a deferred sales charge of 1.00% if redeemed within one yearShareholder Fees (fees paid directly from your investment) Investment Objective<p style="TEXT-ALIGN: left"> <font style="font-weight: normal; font-size: 10pt; font-style: normal; font-family: ;" color="#000000">The fund seeks as high a level of current income exempt from federal and New Jersey income taxes as is consistent with the preservation of capital.</font> </p>Example<p style="TEXT-ALIGN: left"> <font style="font-weight: normal; font-size: 10pt; font-style: normal; font-family: ;" color="#000000">The Example is intended to help you compare the cost of investing in the fund with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in the fund for the time periods indicated and then redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the fund's operating expenses remain the same. The one-year example and the first year of the three-, five- and ten-years examples are based on net operating expenses, which reflect the expense waiver/reimbursement by The Dreyfus Corporation. Although your actual costs may be higher or lower, based on these assumptions your costs would be:</font> </p>533732947156526353493120406122239890567237421955533732947156516353493120406122239890567237421955~ http://dreyfus.com/20130426/role/ScheduleExpenseExampleTransposed20003 column dei_LegalEntityAxis compact ck0000828475_S000000091Member row primary compact * ~~ http://dreyfus.com/20130426/role/ScheduleExpenseExampleNoRedemptionTransposed20004 column dei_LegalEntityAxis compact ck0000828475_S000000091Member row primary compact * ~You would pay the following expenses if you did not redeem your shares: Performance<p style="text-align:left;"> <font color="#000000" style="font-size:10.0pt;font-style:normal;font-weight:normal; font-family: ;">The following bar chart and table provide some indication of the risks of investing in the fund. The bar chart shows changes in the performance of the fund's Class A shares from year to year. The table compares the average annual total returns of the fund's shares to those of a broad measure of market performance. The fund's past performance (before and after taxes) is not necessarily an indicator of how the fund will perform in the future. Sales charges, if any, are not reflected in the bar chart, and if those charges were included, returns would have been less than those shown. More recent performance information may be available at</font> <font><u><font color="#000000" style="font-size:10.0pt;font-style:normal;font-weight:normal; font-family: ;">www.dreyfus.com</font></u></font><font color="#000000" style="font-size:10.0pt;font-style:normal;font-weight:normal; font-family: ;">.</font> </p>Year-by-Year Total Returns as of 12/31 each year (%) Class A0.04900.03910.03220.04000.0205-0.04610.13650.00560.10720.0696~ http://dreyfus.com/20130426/role/ScheduleAnnualTotalReturnsBarChart20005 column dei_LegalEntityAxis compact ck0000828475_S000000091Member column rr_ProspectusShareClassAxis compact ck0000828475_C000000134Member row primary compact * ~Best Quarter0.07592009-09-30Worst Quarter-0.05292010-12-31<p style="margin-left: 04.00pt; text-align: left;"> <font><strong><font style="font-size: 10.0pt; font-style: normal;">Best Quarter</font></strong></font><font style="font-size: 10.0pt; font-style: normal; font-weight: normal;"><br /> Q3, 2009: 7.59%</font> </p> <br/><p style="margin-left: 04.00pt; text-align: left;"> <font><strong><font style="font-size: 10.0pt; font-style: normal;">Worst Quarter</font></strong></font><font style="font-size: 10.0pt; font-style: normal; font-weight: normal;"><br /> Q4, 2010: -5.29%</font> </p><p style="text-align:left;"> <font color="#000000" style="font-size:10.0pt;font-style:normal;font-weight:normal; font-family: ;">After-tax performance is shown for Class A shares. After-tax performance of the fund's other share classes will vary. After-tax returns are calculated using the historical highest individual federal marginal income tax rates, and do not reflect the impact of state and local taxes. Actual after-tax returns depend on the investor's tax situation and may differ from those shown, and the after tax returns shown are not relevant to investors who hold their shares through tax-deferred arrangements such as 401(k) plans or individual retirement accounts.</font> </p> <br/><p style="text-align:left;"> <font color="#000000" style="font-size:10.0pt;font-style:normal;font-weight:normal; font-family: ;">For the fund's Class C and Class I shares, periods prior to the inception date of such classes reflect the performance of the fund's Class A shares adjusted to reflect any applicable sales charges. Such performance figures have not been adjusted, however, to reflect applicable class fees and expenses; if such fees and expenses had been reflected, the performance shown for Class C for such periods may have been lower. Unlike the fund, the Barclays Municipal Bond Index is not comprised of a single state. For comparative purposes, the value of the index on 5/31/07 is used as the beginning value on 6/7/07.</font> </p> 0.02170.04280.03950.02170.04280.03940.02680.04240.03950.05090.04440.03620.07040.05370.04490.07040.05320.04730.06780.05910.05100.05561987-11-062007-06-072008-12-152003-01-07~ http://dreyfus.com/20130426/role/ScheduleAverageAnnualReturnsTransposed20006 column dei_LegalEntityAxis compact ck0000828475_S000000091Member column rr_PerformanceMeasureAxis compact * row primary compact * ~After-tax returns are calculated using the historical highest individual federal marginal income tax rates, and do not reflect the impact of state and local taxes.The following bar chart and table provide some indication of the risks of investing in the fund.The fund's past performance (before and after taxes) is not necessarily an indicator of how the fund will perform in the future.reflects no deduction for fees, expenses or taxesSales charges, if any, are not reflected in the bar chart, and if those charges were included, returns would have been less than those shown.www.dreyfus.comAverage Annual Total Returns (as of 12/31/12) Actual after-tax returns depend on the investor's tax situation and may differ from those shown, and the after tax returns shown are not relevant to investors who hold their shares through tax-deferred arrangements such as 401(k) plans or individual retirement accounts.Principal Investment Strategy<p style="TEXT-ALIGN: left"> <font style="font-weight: normal; font-size: 10pt; font-style: normal; font-family: ;" color="#000000">To pursue its goal, the fund normally invests at least 80% of its net assets, plus any borrowings for investment purposes, in municipal bonds that provide income exempt from federal and New Jersey state income taxes. The fund invests at least 80% of its assets in municipal bonds rated investment grade (Baa/BBB or higher) or the unrated equivalent as determined by The Dreyfus Corporation. The dollar-weighted average maturity of the fund's portfolio normally exceeds ten years, but the fund may invest without regard to maturity. Dollar-weighted average maturity is an average of the stated maturities of the securities held by the fund, based on their dollar-weighted proportions in the fund.</font> </p> <br/><p style="TEXT-ALIGN: left"> <font style="font-weight: normal; font-size: 10pt; font-style: normal; font-family: ;" color="#000000">The portfolio managers focus on identifying undervalued sectors and securities and select municipal bonds by (i) using fundamental credit analysis to estimate the relative value and attractiveness of various sectors and securities and to exploit pricing inefficiencies in the municipal bond market, and (ii) actively trading among various sectors based on their apparent relative values. The fund may buy securities that pay interest at rates that float inversely with changes in prevailing interest rates (inverse floaters) in an effort to increase returns, to manage interest rate risk or as part of a hedging strategy.</font> </p> <br/><p style="TEXT-ALIGN: left"> <font style="font-weight: normal; font-size: 10pt; font-style: normal; font-family: ;" color="#000000">Although the funds seeks to provide income exempt from federal and New Jersey state income taxes, interest from some of the fund's holdings may be subject to the federal alternative minimum tax.</font> </p>